CVE•Published 2023-06-07•Modified 2026-04-08•1 article on news•6 live references•NVD data

CVE-2020-36731Wpdesk · Flexible_checkout_fields

Vulnerability data via NVD (ingested)

CVSS v3.1

7.2

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

EPSS percentile

Exploit Prediction Scoring System · top 5% of all CVEs

Weaknesses (CWE)

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Description

The Flexible Checkout Fields for WooCommerce plugin for WordPress is vulnerable to Unauthenticated Arbitrary Plugin Settings update, in addition to Stored Cross-Site Scripting in versions up to, and including, 2.3.1. This is due to missing authorization checks on the updateSettingsAction() function which is called via an admin_init hook, along with missing sanitization and escaping on the settings that are stored.

Timeline

Published 2023-06-07

Modified 2026-04-08

External references

NVD MITRE Exploit-DB GitHub PoC trickest/cve VulnCheck

Search for exposed instances

Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).

Shodan · vuln tag0 hosts

vuln:CVE-2020-36731

Hosts Shodan has explicitly fingerprinted as vulnerable.

Shodan · WP plugin path

http.html:"/wp-content/plugins/flexible-checkout-fields/"

Matches any site loading the "flexible-checkout-fields" plugin — doesn't rely on Shodan's vuln tag.

Shodan · product

product:"Wpdesk Flexible Checkout Fields"

All exposed Wpdesk Flexible Checkout Fields instances — cross-reference with the CVE's affected-version range.

Shodan · banner/body mention

http.html:"Flexible Checkout Fields"

HTTP body or banner mentions "Flexible Checkout Fields" — catches deploys Shodan didn't identify as a product.